Class variables
Class variables are defined within the class construction, so these variables are available before any class instance is created. To get access to a class variable, simply access it using the class name, and then provide the variable name.
class Demo:
class_var = 'shared variable'
print(Demo.class_var)
print(Demo.__dict__)
Similarly to instance variables, class variables are shown in the class's __dict__ dictionary.
shared variable
{'__module__': '__main__', 'class_var': 'shared variable', '__dict__': , '__weakref__': , '__doc__': None}
output